Drilling-head for the sinking of shafts



G. ALLIMANN Re. 25,470 DRILLING-HEAD FOR THE SINKING OF' SHAFTS,GALLERIES AND THE LIKE Nov. 5, 1963 4 Sheets-Sheet 2 Original Filed June29, 1956 FCIZ.

G. ALLIMANN Re. 25,470

DRILLING-HEAD FOR THE SINKING OF SHAFTS, GALLERIES AND THE LIKE Nov. 5,1963 4 Sheets-Sheet 3 Original Filed June 29, 1956 INVENTOR GeorgesAllimann BY '(aa KO. LOCKS ATTORNEY Nov. 5, 1963 G. ALLIMANN 25,470

DRILLING-HEAD FOR THE smxmc; OF SHAFTS, GALLERIES AND THE LIKE OriginalFiled June 29, 1956 4 Sheets-Sheet 4 4 H g W 1 c 2' u INVENTOR.

Georges A|Iimcnn BY nm (LIT/ cars ATTORNEY United States Parent Ofl iceRe. 25,470 'Reissued Nov. 5, 1963 25,470 DRlLLING-HEAD FOR THE SINKINGOF SHAPTS, GALLERIES AND THE LIKE Georges Allimann, Mlhouse, France,assignor to Ateliers de Carspach, Ca'spach (Haut-Rhin), France, a Frenchjoint-stock company Original No. 2,976,027, dated Mar. 21, 1961, Ser.No. 594,821, June 29, 1956. Application for reissue Dec. 18, 1962, Ser.No. 246,306

Claims priority, application France July 2, 1955 2 Claims. (CI. 262-7)Matter enclosed in heavy brackets appears in the original patent butforms no part of this reissue specification; matter printer! in italicsindicates the additions made by reissue.

The present invention has for its object a drilling machine for theboring of levels or galleries, shafts, or cutting-holes in mines,quarries or works-sites.

Said machine is essentially nechanical both in its components andControls, which renders it very robust. It does not moreover require anypowerful application thereof against the wall of the rock in order tocarry out the boring of this wall; this results in the machine beinglight and of a low over-all size.

The machine according to the invcntion comprises a rotary head, apluralty of drilling rotating plates on the head, provided on their topface with picks [inclined] having Ch'tzg edgcs fac'g toward thedirection of rotation of the plates, said plates being set at an angiewith a piane perpendicular to the longitudinal axis of the machine andtheir axis being inclined relative to planes comprising thislongitudinal axis, means for rotating said head, means for rotating saidplates, and means for removing the muck as the machine advances.

Other features and advantages of the present invention will becomeapparent from the description which will follow below, and which is madewith reference to the attachcd drawings.

In these drawings:

FIG. l is a View in elevation of a drilling machine in accordance withthe invention.

FIG. 2 is an end view of the driiling machine.

FIGS. 3 and 4 are explanatory diagrams showing how the machine operates.

FlG. 5 is a longitudinal section thorugh the drilling machine of FIG. 1.

FIG. 6 is a diagrammatic showing of the drilling machine of `FIG. 1 anda part of an attached evac uation device.

In the form of embodiment shown in FIGS. 1 and 2, the driliing machinein accordance with the invention comprises a head 1 provided with twocircular plates 2-2a. These piates rotate about their own axes and eachcarry on their top face, a series of picks 3 [inclined] having Clltlgcdges far-ing toward the direction of rotation of the plates. Theseplates are set at an angle to a plane perpendicular to the longitudinalaxis of the machine, and their axes are inclined relative to any planecomprising this longitudinal axis.

The drilling machine comprises, in addition, a central pilot drill 4.This precedes a skirt or casing 5 around which is fixed an Archimedeanscrew 6. This skirt and this screw in their turn precede a piuraiity oftelescopic tubes 7. A tipper or shovel 8 is formed on the head in orderthat the drilling products may be suitably brought on to the evacuationscrew 6.

The operation of this drilling machine is as follows:

The pilot driil 4 first of all attacks the rock R which is to bedrilled. It it is assumed that this drill rotates in the direction ofthe arrow fl, the head 1 which carries it will rotate in the oppositedirection (arrow f2) in order to compensate its reaction. By reason ofthe proper rotation of the head on its own axis, of the rotation of theplates 2-2a and of their positions, thc picks 3 can strike the wall ofthe rock each in its turn after which each is immediately withdrawn inthe same way as with the blow of a pick (FIGS. 3 and 4). In FIGURE 4markings 3a show such pick blows. They result from the rotation of theplate carrying the picks and from the rotation of the head and areconstituted by portions of a cycloid. The direction of rotation of theplates is not important; the direction of rotation indicated by thearrow f3 has been given by way of example only. In this case, it enablesthe reaction of the drill 4 to be compensated and contributes to thecorrect balance of the machine.

The pieces of rock broken away from the wall by the cutters strikingeach in its turn and for a short period of time at each stroke, areremoved by the Archimedean screw 6 which is fixed to the skirt 5. Thisskirt rotates about its own axis in the direction of the arrow f4, insuch manner that the products broken off from the wall of rock areevacuated to the exterior of the cavity 9 which is bored by the drillinghead. As the drilling head advances into the wall of rock, thetelescopic tubes 7 extcnd and push the head outwards so as to enable itto carry out its work. The products collected by the Archimedean screw 6can then be discharged towards the extcrior by using the cxtende dseries of tubes 7.

To this end, an opening Sa may be formed in the skirt 5 in order thatthe products collected by the screw 6 may pass inside the tubes. Thisopening may be formed in the skirt just behind the head and after thetippcr S. The current supply cables, for example for the motor housedinside the head 1, and which is preferably electric, also employ thechannel provided by the tubes which follow each other.

Rcferring now to FIG. 5, it may be seen that the head 1 has a main driveshaft 11 extending axially therein, the shaft 11 having the pilot -drill4 mounted thereon. A pinion 12 on shaft 11 is in engagement with a pairof driven gears 13 and 14 which serve to drive the plates 2 and Zathrough the shafts 15 and 16, respectively. These plates 2 and Za may beat different distatnces from the center of rotation of the head 1.

The head 1 is rotated from a pinion 18 on drive shaft Il, this pinionengaging with a pair of transfcr pinions 19 and 21, carried by arbors 20and 22; pinion 21 drives ring gear 23 attached to the head 1.

Adjacent pinion 18 is a pinion 24 for driving the skirt or casing 5, thepinion 24 engaging with a tranfer gear 25 that is carried by arbor 26and engages with ring gear 27 on the skirt 5. As will be obivous, thedirections of rotation of the various members will be as statedhcreinabove, and as indicated by appropriate arrows.

The telescopic tube 7 having the smallest diameter is provided with abulkhead 30, this bulkhead having the arbors 20, 22 and 26 aflixed toit. The opening Sa of the skirt 5 enters the innermost tube 7immediately rearwardly of bulkhead 30', to thereby prevent the rockdebris from coming into contact with the above mentioned gearing.

The outermost telescopic tube 7 is provided with a support 31 thatcarries a fluid motor or jack 32, which has a pisten rod 33 secured tothe bulkhead 30. By actuation of the jack 32, the tubes 7 may beextended to push the head 1 forward.

In FIG. 6 there is shown the machine of FIGS. 1 and 5, together with aconveyor apparatus for removing the rock debris from the tubes 7. Thismay take the form of a plurality of jointed tubes, each supported onwheels 36 and having therewithn suitable Archimedean screws (not shown),driven by a motor 37.

The head 1 is always accessible; it is quite easy for a person to gainaccess to the head through a man-bole provided in one of the tubes 7.

The pilot drill 4 is optional and it is possible to envisage a drillingmachine similar to that of the invention which Would have no pilotdrill.

By the use of the drilling machine shown in FIGS. 1 and 2 cylindricalcavities are obtained.

In a general way, the above description has only been given by way ofindication and without any implied limitation, and the invcntion iscapable of a large number of alternative forms in aceordance with itsspirit.

I claim:

1. In a drilling machine for the excavation of galleries and the like, arotary head, a plurality of rotary drilling plates on the head providedon their top face with picka [inelined] having cutting cdgcs facingtoward the direction of rotation of the plates, said plates being set atan angle with a plane perpendicular to the longitudinal axis of themachine and their axes being inclined relative to any plane eomprisingthis longitudinal axis, means for rotating said head, means for rotatingsaid plates, and means for removing the muck as the machine advances.

2. In a drilling machine for the excavation of galleries and the like, arotary head, a plurality of rotary drilling plates on the head providedon their top =face with picks [inclined] having cuni/:g edges facngtoward the direction of rotation of the plates, said plates being set atan angle With a plane perpendieular to the longitudinal axis of themachine and their axes being inclined relative to any plane conprisingthis longitudinal axis, said plates being positioned at differentdistances from the center of rotation of said rotary head, means forrotating said head, means for rotating said plates and means forremoving the nuck as the machine advances.

References Cited in the file of this patent or the original patentUNITED STATES PATENTS 556985 Hurd Mar. 24, 1896 1,043,185 Wittich Nov.5, 1912 1,353,908 Hodgson Sept. 28, 1920 1,417,363 Wadsworth May 23,1922 2,118,490 Challoeombe May 24, 1938 2,466,7( 9 Kat* Apr. 12, 19492,758,825 Wohlmeyer Aug. 14, 1956 2,760,766 Maya Aug. 28, 1956 FOREIGNPATENTS 62,281 Denmark Oct. 31, 1941 2,544 Great Britain of 1876

